How to download something from the internet?
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What major changes released in ios7, ios8, ios9+?
What is core data stack?
how push notification works?
What is id in ios?
Is there any garbage collector concept available in iOS?
What are ios functions?
What is the purpose of UIWindow object in iOS operating system?
Explain parent-child context setup. How does it work? What are the advantages?
Which all frameworks you worked in ios ?
Explain commonly ios libraries
How to handle concurrency problems in core data?
What is managed object context?